Audio amplifier



FIG. 1 is a perspective view of an audio amplifier showing our new design;

FIG. 2 is another perspective view of the audio amplifier of FIG. 1;

FIG. 3 is another perspective view of the audio amplifier of FIG. 1;

FIG. 4 is a front view of the audio amplifier of FIG. 1;

FIG. 5 is a rear side view of the audio amplifier of FIG. 1;

FIG. 6 is a left side view of the audio amplifier of FIG. 1;

FIG. 7 is a right side view of the audio amplifier of FIG. 1;

FIG. 8 is a top view of the audio amplifier of FIG. 1; and,

FIG. 9 is a bottom view of the audio amplifier of FIG. 1.

In the drawings, the broken lines illustrate portions of the audio amplifier that form no part of the claimed design. 

CLAIM The ornamental design for an audio amplifier, as shown and described. 